> before I send my application I would like to know if my qualification is
> sufficient for the various tasks. Of course I'm open to some embedded work
> as well, but what I really like is the DSP... :)

[...]

> With this background what can you recommend me, before I create my
> application?

I'd say that with that kind of background and interest, there should be
nothing that prevents you from becoming a very good Rockbox contributor and
gsoc student. I would suggest that you write up an application for the project
you think would be the most fun, challanging and perhaps most popular in the
Rockbox community and submit that. You can in fact submit more than one should
you want to offer us alternatives to pick from.